| 小麦抗赤霉病基因库研究 Ⅵ.轮选品系与原始亲本的综合分析与比较 |
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| 引用本文： | 蒋国梁,陈兆夏.小麦抗赤霉病基因库研究 Ⅵ.轮选品系与原始亲本的综合分析与比较[J].作物学报,1997,23(3):326-332. |
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| 作者姓名： | 蒋国梁 陈兆夏 |
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| 作者单位： | 南京农业大学小麦品种研究室，江苏南京，210095 |
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| 基金项目： | 国家自然科学基金资助项目，国家“八五”攻关项目的部分内容 |
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| 摘 要： | 用２６个来自基因库的轮选品系或抗源材料和１９个原始亲本，在赤霉病单花接种条件下，对抗性和１６个农艺性状进行综合分析与比较。平均而言，从接种后１６－１７到２６－２７天，病小穗数和病小穗率的扩增值，轮选品系比原始亲本分别少１．３２个和７．１１％。
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| 关 键 词： | 小麦 基因库 轮回选择 育种 抗赤毒病性 |
| 收稿时间： | 1995-08-09 |
| 修稿时间： | 1996-04-22 |
Studies on the Development of Scab Resistant Gene Pool in Wheat |
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| Jiang Guoliang,Chen Zhaoxia,Xu Yong,Wu Zhaosu.Studies on the Development of Scab Resistant Gene Pool in Wheat[J].Acta Agronomica Sinica,1997,23(3):326-332. |
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| Authors: | Jiang Guoliang Chen Zhaoxia Xu Yong Wu Zhaosu |
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| Institution: | Wheat Research Laboratory, Nanjing Agricultural University, Nanjing,210095 |
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| Abstract: | The scab resistance and agronomic characters of 26 recurrent selection strains from the scab resistant gene pool of wheat and 19 original parents were comprehensively analyzed and compared after single-floret inoculation with Cibberella zeae. On the average, the increased number and percentage of diseased spikelets in the recurrent selection strains were 1. 32 and 7. 11% less than those of their original parents, respectively, from 16-17 days to 26-27 days after inoculation. The mean number and percentage of diseased spikelets observed on the 26-27th day after inoculation were 5. 35 and 24. 39% for the recurrent selection strains, respectively, and were 2. 72 and 14. 75% less than those of their original parents. The mean resistance level of the recurrent selection strains to scab spread was moderately resistant (MR) but that of their original parents was moderately susceptible (MS). The mean plant height of the recurrent selection strains was about 20 cm shorter than that of their original parents. The biomass, grain yield per plant and stalk, number of grains per spike, 1000-grain weight and harvest index were also significantly improved. Some of the recurrent selection strains possess not only higher resistance to scab but also desirable agronomic characteristics, These results further demonstrated that the development of scab resistant gene pool, using the dominant male-sterile gene ms2 (Tal) , in combination with conventional breeding is an effective approach for the improvement of scab resistance in wheat. |
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| Keywords: | Wheat Gene pool Recurrent selection Breeding Development of germplasm Resistance to scab Agronomic traits |
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